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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#182870#5407. 基础图论练习题FLY0 134ms113760kbC++145.0kb2023-09-18 17:43:142023-09-18 17:43:15

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你现在查看的是最新测评结果

  • [2023-09-18 17:43:15]
  • 评测
  • 测评结果:0
  • 用时:134ms
  • 内存:113760kb
  • [2023-09-18 17:43:14]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define For(i,a,b) for(int i=(a);i<=(b);i++)
#define dFor(i,a,b) for(int i=(a);i>=(b);i--)
#define abs_(x) max(x,-(x))
#define tomin(x,y) x=min(x,y)
#define tomax(x,y) x=max(x,y)
#define eq(x,y) (abs_((x)-(y))<=eps) 
#define db double
#define pw(x) ((x)*(x))
#define y1 __
#define vci vector<int> 
#define pb push_back
#define all(x) x.begin(),x.end()
constexpr int N=5e3+5,P=1e9+7;
int read()
{	
	int x=0,y=1;
	char c=getchar();
	for(;!isdigit(c);c=getchar()) if(c=='-') y=0;
	for(;isdigit(c);c=getchar()) x=(x<<3)+(x<<1)+(c^48);
	return y?x:-x;
}
char getc()
{
	char c=getchar();
	for(;!isdigit(c)&&!isalpha(c);c=getchar()) ;
	return c;
}
int turn(char t)
{
	if(isdigit(t)) return t-'0';
	return t-'A'+10;
}
int n;
bool e[N][N];
vector<int> scc[N];
vector<int> e2[N];
int bel[N];
int stk[N],dfn[N],low[N],tot,ct,ct2;
bool vs[N];
int ans[N][N];
void tarjan(int u)
{
//	cout<<"<<"<<u<<"  "<<dfn[u]<<endl;
	vs[u]=1;
	dfn[u]=low[u]=++tot;
	stk[++ct]=u;
	For(v,1,n) if(e[u][v])
	{
		if(!dfn[v]) { tarjan(v); low[u]=min(low[u],low[v]); }
		else if(vs[v]) low[u]=min(low[u],low[v]);
	}
	if(low[u]==dfn[u])
	{
		ct2++;
		do
		{
			int v=stk[ct--];
			vs[v]=0;
			bel[v]=ct2;
			scc[ct2].pb(v);
		}while(stk[ct+1]!=u);
	}
}
int cid[N];
int rd[N];
int q[N];
int Sum;
void tarjan2(int u)
{
	vs[u]=1;
	dfn[u]=low[u]=++tot;
	stk[++ct]=u;
	For(v,1,n) if(e[u][v])
	{
		if(!dfn[v]) { tarjan2(v); low[u]=min(low[u],low[v]); }
		else if(vs[v]) low[u]=min(low[u],low[v]);
	}
	if(low[u]==dfn[u])
	{
		Sum++;
		do
		{
			int v=stk[ct--];
			vs[v]=0;
		}while(stk[ct+1]!=u);
	}
}
void cls()
{
	tot=ct=ct2=0;
	memset(vs,0,n+2);
	memset(dfn,0,n+2<<2);
}
void solve(vector<int> nw)
{
//	cout<<"A";
	int sz=nw.size();
//	cout<<"  "<<sz<<endl;
//	For(i,0,sz-1) cout<<nw[i]<<" "; puts("");
	vector<int> h;
	for(int u:nw)
	{
		if(h.empty()) { h.pb(u); continue; }
		if(e[u][h[0]]) { h.insert(h.begin(),u); continue; }
		if(e[h.back()][u]) { h.pb(u); continue; }
		for(int i=0;i<h.size()-1;i++)
		{
			if(e[h[i]][u]&&e[u][h[i+1]])
			{
				h.insert(h.begin()+i+1,u);
				break;
			}
		}
	}
//	cout<<"B";
//	for(int u:h) cout<<u<<" "; puts("");
	int t=0;
	if(sz==1) goto ok; 
	for(int i=1;;i++)
	{
		if(e[h[i]][h[0]]) { t=i; break; }
	}
	for(int i=t+1;i<sz;i++)
	{
		For(j,0,t)
		{
			if(e[h[i]][h[j]])
			{
				vector<int> ls;
				For(l,j,t) ls.pb(h[l]);
				For(l,0,j-1) ls.pb(h[l]);
				For(l,t+1,i) ls.pb(h[l]);
				For(l,0,i) h[i]=ls[i];
				t=i;
				break;
			}
		}
	}
//	cout<<"C";
//	for(int i=0;i<sz;i++)
//	{
//		int u=h[i],v=h[(i+1)%sz];
//		if(!e[u][v]) puts("FLY");
//	}
	ok: ;
//	puts("FLY");
//	for(int u:nw) cout<<u<<" "; puts(""); 
//	for(int u:h) cout<<u<<" "; puts(""); 
//	return;
	For(i,0,sz-1)
	{
		int u=h[i],v=h[(i+1)%sz];
		e[u][v]=0,e[v][u]=1;
		cls();
		Sum=0;
		For(u,1,n) if(!dfn[u]) tarjan2(u);
		ans[u][v]=Sum;
		e[u][v]=1,e[v][u]=0;
	}
//	cout<<"D";
}
int h[N][N];
int pw2[N*N];
int work()
{
	n=read();
	For(i,1,n) For(j,1,n) e[i][j]=h[i][j]=0;
	For(i,1,n) scc[i].clear();
	For(i,1,n) e2[i].clear();
	
//	int m=n*(n-1)/2;
//	For(i,1,m)
//	{
//		int u=read(),v=read();
//		e[u][v]=1;
//	}
	
	For(i,1,n-1)
	{
		int up=(i+3)>>2;
		For(j,1,up)
		{
			int t=turn(getc()); 
			For(k,0,3)
			{
				bool tt=t>>k&1;
				int t1=i+1,t2=4*j+k-3;
				if(t2<t1)
				{
					if(tt) e[t1][t2]=1;
					else e[t2][t1]=1;
				}
			}
		}
	}

//	For(i,1,n)
//	{
//		For(j,1,n) putchar(e[i][j]+'0'); puts("");
//	}
	cls();
//	puts("FLY");
	For(i,1,n) if(!dfn[i]) tarjan(i);
//	puts("SKY");
	memset(rd,0,n+2<<2);
	For(u,1,n)
	{
		For(v,1,n) if(e[u][v]&&bel[u]!=bel[v])
		{
			int t1=bel[u],t2=bel[v];
			h[t1][t2]++;
			e2[t1].pb(t2);
			rd[t2]++;
		}
	}
	int l=1,r=0;
	For(i,1,ct2) if(!rd[i]) q[++r]=i;
	while(l<=r)
	{
		int u=q[l++];
		cid[u]=l-1;
		for(auto v:e2[u])
		{
			rd[v]--;
			if(!rd[v]) q[++r]=v;
		}
	}
//	cout<<ct2<<endl;
//	puts("RUI");
	For(i,1,n) For(j,1,n) ans[i][j]=ct2;
//	For(i,1,r) cout<<bel[q[i]]<<" "; puts("");
	For(i,1,n) For(j,1,n) if(e[i][j])
	{
		if(bel[i]==bel[j]) continue;
		int u=bel[i],v=bel[j];
		ans[i][j]=ct2-(cid[v]-cid[u]);
		if(cid[v]-cid[u]==1&&h[u][v]==1) ans[i][j]++;
//		cout<<i<<" "<<j<<"  "<<cid[u]<<" "<<cid[v]<<"  "<<u<<" "<<v<<"  "<<ans[i][j]<<endl;
	}
	int tct2=ct2;
	For(i,1,tct2) solve(scc[i]);
	
//	puts("ONE");
	int Ans=0;
	For(i,1,n)
	{
		For(j,1,i-1)
		{
			int t=(e[i][j]?ans[i][j]:ans[j][i]);
			Ans=(Ans+pw2[(i-2)*(i-1)/2+j-1]*1ll*t)%P;
//			cout<<"  "<<j<<" "<<i<<" "<<t<<endl;
		}
	}
	return Ans;
//	For(i,1,n) 
//	{
//		For(j,1,n) putchar(e[i][j]+'0');
//		puts("");
//	}
}
int main()
{
	pw2[0]=1;
	For(i,1,N*N-5) pw2[i]=(pw2[i-1]+pw2[i-1])%P;
	int T=read();
	while(T--) printf("%d\n",work());
	return 0;
}
/*
1
6
1 2
2 3
3 1
4 5
5 6
6 4
1 4
1 5
1 6
2 4
2 5
2 6
3 4
3 5
3 6
*/






Details

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Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 0
Wrong Answer
time: 134ms
memory: 113760kb

input:

10000
100
1
2
2
8
C0
F0
27
78
AE1
C01
511
D87
EF20
3873
2742
73D0
DC9B0
FB2A3
9C011
9B4E0
95DC00
A7B980
F43531
6A6245
5347BE0
1A6C8A1
88E46D6
64CF3AE
D25F63C1
C894E4C3
1C0AFD73
EC1C3F9A
087CE17C0
22149A380
B28038AF1
B9CA21C7F
D78F5307C1
49045489A2
72C4DE6FD1
7713F40D05
EEE8878EEC1
310E62812B1
DA9D5B...

output:

281603732
13
285212672
371842543
84
0
1983
2
268505087
268435455
719476259
32785
2
719476771
111
2621567
2523
0
719476275
371842543
2097159
41087
34815
3113984
719478307
502774846
719476267
719476259
719476259
65128
268435467
719477283
36863
2171007
719476259
371842543
120
84
219
5769215
268435455
1...

result:

wrong answer 11th numbers differ - expected: '719476515', found: '719476259'

Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Skipped

Dependency #1:

0%

Subtask #4:

score: 0
Skipped

Dependency #1:

0%

Subtask #5:

score: 0
Skipped

Dependency #1:

0%